A hotel has 40 rooms and 40 bathrooms for ventilation. Horizontal installation without shaft, air duct and fan ceiling. What kind of fan is used for the 70-meter air duct, and the noise does not excee

A hotel has 40 rooms and 40 bathrooms for ventilation. Horizontal installation without shaft, air duct and fan ceiling. What kind of fan is used for the 70-meter air duct, and the noise does not exceed the standard. The national standard is 7 times per hour. Doing 10 times requires a lot of you. Because you don't know your sanitary size, we need to discharge130m3 multiplied by 40 per hour, which is 5200m2/h. The fan is an axial fan with an exhaust volume of 6000m2/h. You can design the air duct accordingly, and add a mute speaker if mute is considered.